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Energetics of the Photodissociation of Polyatomic Molecules

  • K. F. Freed
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 18)

Abstract

We present a quantum mechanical theory of the decomposition processes of polyatomic molecules, an important relaxation channel for electronically or thermally excited molecular systems. Both direct photodissociation and weak predissociation are described from a unified standpoint. An essential feature of the polyatomic molecule dissociation is the fact that the excess energy may be partitioned among the vibrational and rotational degrees of freedom in addition to the electronic and translational ones which are the only degrees of freedom accessible in diatomic molecule dissociations. The central focus of the theory is, therefore, on the description of the vibrational, translational, rotational, etc. energy distributions of the decomposition fragments and on the factors, such as the bound and dissociative potential energy surfaces, the excitation wavelength, etc., influencing these distributions. The theory describes both the sudden Franck-Condon process, leading to the electronic transition from a bound to a dissociative state, and the half-collision wherein the fragments mutually interact while they recede from each other on the dissociative potential energy surface.

Keywords

Potential Energy Surface Potential Energy Curve Polyatomic Molecule Triatomic Molecule Internal Energy Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1980

Authors and Affiliations

  • K. F. Freed
    • 1
  1. 1.The Department of Chemistry and The James Franck InstituteThe University of ChicagoChicagoUSA

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